diff --git a/IpViewer.BusinessObject/IpViewer.BusinessObject.csproj b/IpViewer.BusinessObject/IpViewer.BusinessObject.csproj
index 1b26a92..0057901 100644
--- a/IpViewer.BusinessObject/IpViewer.BusinessObject.csproj
+++ b/IpViewer.BusinessObject/IpViewer.BusinessObject.csproj
@@ -20,7 +20,7 @@
     <PackageReference Include="System.Configuration.ConfigurationManager" Version="8.0.0" />
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="log4net" Version="2.0.15" />
+    <PackageReference Include="log4net" Version="3.3.0" />
   </ItemGroup>
   <ItemGroup>
     <Compile Remove="Properties\Resources.Designer.cs" />
diff --git a/IpViewer/IpViewer.csproj b/IpViewer/IpViewer.csproj
index 7db8df0..1ed2ad8 100644
--- a/IpViewer/IpViewer.csproj
+++ b/IpViewer/IpViewer.csproj
@@ -43,7 +43,7 @@
     <ProjectReference Include="..\IpViewer.BusinessObject\IpViewer.BusinessObject.csproj" />
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="log4net" Version="2.0.15" />
+    <PackageReference Include="log4net" Version="3.3.0" />
     <PackageReference Include="Microsoft.CSharp" Version="4.7.0" />
     <PackageReference Include="System.Data.DataSetExtensions" Version="4.5.0" />
     <PackageReference Include="Microsoft.AspNetCore.SystemWebAdapters" Version="1.3.0" />